sunset
n. C / Un. the time in the evening when the sun goes down and the sky changes color. It also means the end of something, like a law or a business deal.
n. the daily disappearance of the sun below the western horizon. In a figurative or legal context, it refers to the gradual decline or the scheduled termination of a program, law, or agreement.
We watched the beautiful sunset from the beach.
The new tax law includes a sunset clause, meaning it will automatically expire in five years unless the government renews it.
As the industry moved toward digital solutions, the company began the sunset of its legacy hardware support to focus resources on emerging technologies.
From Middle English son-sett, Sonne set, equivalent to sun + set. In Gower's Confessio Amantis, before 1393.
Countable when referring to the daily event; often used as a modifier in business (e.g., 'sunset clause' or 'sunset provision') to describe the planned phase-out of a product or policy.